include @zkamvar suggestions
-rw-r--r-- 364 .editorconfig
drwxr-xr-x - .github
-rw-r--r-- 194 .gitignore
-rw-r--r-- 774 404.md
-rw-r--r-- 330 CODE_OF_CONDUCT.md
-rw-r--r-- 245 Gemfile
-rw-r--r-- 3318 LICENSE.md
-rw-r--r-- 4799 Makefile
drwxr-xr-x - _episodes
drwxr-xr-x - _episodes_rmd
drwxr-xr-x - _extras
drwxr-xr-x - _includes
drwxr-xr-x - _layouts
-rw-r--r-- 292 aio.md
drwxr-xr-x - assets
drwxr-xr-x - bin
drwxr-xr-x - code
drwxr-xr-x - data
drwxr-xr-x - fig
drwxr-xr-x - files